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In order to make the normal work of the drill, the stabilizer should be replaced regularly. When the first use of the new composite pieces, to pay attention to the cleaning of the drilling site, to prevent the use of debris affect normal. The replacement of the drill, to carefully check the thread and the teeth are intact, gently push trial is no problem. To ensure there is no dust, air outlet unobstructed, thread lubricating by lifting and rotating with the way a good bit connection to use. It is forbidden to use the bending of the drill pipe to avoid the damage of the drill bit, which affects the normal use time. Choose different bit and operation method according to different situations.